EMILE/libemile/emile_second_set_kernel_scsi.c
2004-12-09 22:57:09 +00:00

103 lines
2.3 KiB
C

static __attribute__((used)) char* rcsid = "$CVSHeader$";
/*
*
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include "libemile.h"
#include "emile.h"
int emile_second_set_kernel_scsi(int fd, char *kernel_name)
{
int fd_kernel;
int ret;
emile_l2_header_t header;
off_t container_offset;
struct emile_container *container;
int max_blocks;
int i;
unsigned long kernel_image_size;
ret = read(fd, &header, sizeof(header));
if (ret != sizeof(header))
return -1;
if (!EMILE_COMPAT(EMILE_04_SIGNATURE, read_long(&header.signature)))
return -1;
container_offset = read_long(&header.kernel_image_offset);
if (container_offset == 0)
return -1;
ret = lseek(fd, container_offset, SEEK_SET);
if (ret != container_offset)
return -1;
container = (struct emile_container*)
malloc(sizeof(struct emile_container));
if (container == NULL)
return -1;
ret = read(fd, container, sizeof(struct emile_container));
if (ret != sizeof(struct emile_container))
return -1;
max_blocks = container->max_blocks;
free(container);
container = (struct emile_container*)
malloc(sizeof(struct emile_container)
+ max_blocks * sizeof(struct emile_block));
if (container == NULL)
return -1;
container->max_blocks = max_blocks;
fd_kernel = open(kernel_name, O_RDONLY);
if (fd_kernel == -1)
return -1;
ret = emile_scsi_create_container(fd_kernel, container);
if (ret != 0)
return 10;
close(fd_kernel);
kernel_image_size = 0;
for(i = 0; i < max_blocks; i++)
{
if (container->blocks[i].count == 0)
break;
kernel_image_size += container->blocks[i].count;
}
kernel_image_size *= container->block_size;
ret = lseek(fd, container_offset, SEEK_SET);
if (ret != container_offset)
return -1;
ret = write(fd, container, sizeof(struct emile_container)
+ max_blocks * sizeof(struct emile_block));
if (ret != sizeof(struct emile_container)
+ max_blocks * sizeof(struct emile_block))
return -1;
ret = lseek(fd, 0, SEEK_SET);
if (ret != 0)
return -1;
header.kernel_image_size = kernel_image_size;
ret = write(fd, &header, sizeof(header));
if (ret != sizeof(header))
return -2;
return 0;
}